Unable to start task manager in debug mode

[Vishwas Siravara]

Hi guys,

I am not able to start a stand alone session with one task manager and one job manager on the same node by adding debug option in flink-conf.yaml as env.java.opts: -agentlib:jdwp=transport=dt_socket,server=y,suspend=y,address=5005(https://cwiki.apache.org/confluence/display/FLINK/Remote+Debugging+of+Flink+Clusters) . 

This is what my master and slave files look like 

cat masters 

localhost:8081

[was@sl73rspapd031 conf]$ cat slaves

localhost

The job manager comes up but the task manager does not, from the log file 

ERROR: transport error 202: bind failed: Address already in use
ERROR: JDWP Transport dt_socket failed to initialize, TRANSPORT_INIT(510)
JDWP exit error AGENT_ERROR_TRANSPORT_INIT(197): No transports initialized [debugInit.c:750]

This is because the job manager binds 5005 to its process and the task manager cannot do this since it is already associated with the 

job manager, how can I start the task manager ? Should I comment out the debug config from the yaml file after job manager is up and start

the task manger separately ? Thanks for your help.  

[Xintong Song]

Hi Vishwas,

The value of `env.java.opts` will be passed as JVM options to both jobmanager and taskmanager. Thus the same port is set for two processes.

If you need to pass JVM options to jobmanager and taskmanager differently, you can use `env.java.opts.jobmanager` and `env.java.opts.taskmanager`.

On Tue, Jul 9, 2019 at 4:41 AM Vishwas Siravara <[hidden email]> wrote:

Hi guys,

I am not able to start a stand alone session with one task manager and one job manager on the same node by adding debug option in flink-conf.yaml as env.java.opts: -agentlib:jdwp=transport=dt_socket,server=y,suspend=y,address=5005(https://cwiki.apache.org/confluence/display/FLINK/Remote+Debugging+of+Flink+Clusters) . 

This is what my master and slave files look like 

cat masters 

localhost:8081

[was@sl73rspapd031 conf]$ cat slaves

localhost

The job manager comes up but the task manager does not, from the log file 

ERROR: transport error 202: bind failed: Address already in use
ERROR: JDWP Transport dt_socket failed to initialize, TRANSPORT_INIT(510)
JDWP exit error AGENT_ERROR_TRANSPORT_INIT(197): No transports initialized [debugInit.c:750]

This is because the job manager binds 5005 to its process and the task manager cannot do this since it is already associated with the 

job manager, how can I start the task manager ? Should I comment out the debug config from the yaml file after job manager is up and start

the task manger separately ? Thanks for your help.